Improvement in centkifugal pumps



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Letters Patent No. 73,898, dated January 28, 1868.

IMPROVEMENT IN GEN'IRIPIIGAL PUMPS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, EDMUND M. IVENs, of -New Orleans, in parish of Orleans, and State of Louisiana, have invented a new and useful. Improvement in Centrifugal Pumps; and I do herebyr declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, through letters of reference marked thereon, forming part of this specification, in which- Figure l represents a top view of a pump embracing my improvement.

Figure 2 is a side elevation of the same.

Figure 3, a. central vertical section of that portion embracing said improvement.

Figure 4 is a plan view of the guide-plate it of valve G.

This invention has particular reference to that class of pumps used for draining marsh or swamp-lands, and which are usually provided with a foot-valve at the lower end of the suction-pipe, the sole object of which is to retain the charge of water in the pump when not at work, or to facilitate the charging thereof; but as in all such operations there is more or less liability to derangement of the said valve, by chips or dirt getting under it, and in such cases it isinaccessible without removing the entire suction-pipe, which is a work of time, it thereforebecomes comparatively useless. i

The object of my invention is to remedy this diihculty, and it consists in the arrangement of the valve relatively to the pump in a position where it may be'operated to clear it of obstructions, or be opened or closed at pleasure, to afford free course for the water when the pump is in operation, and to retain the charge when the pumping is stopped. It also consistsI inan arrangement of supplemental-pipe connections for facilitating the charging operaticn.

To enable others to make and use my invention, I will describe its construction and operation, by referring to the drawing, in which the same letters appearing in the several figures indicate like parts.

A represents thcframing, to support the pump B, and to which are attached suitable journal-boxes, C, in which the shaft D rotates, motion being communicated to it through the band-wheel E, or in anyV other convenient manner. The pump itself being of, ordinary construction, needs no further description here. The feed or suction-pipeF branches on each side of the pump, and communicates with a central orifice around the shaft D, and is provided at the upper end of its vertical portion with ai valve, G. This valve has a stem, a, passing out through 4the stufng-box 11 in the cover c, and terminates with a cross-head, e. Above and below this valve are branch-pipes d cl, which are connected by a pipe, e. The lower branch, d, is provided with a stop-cock,f, and on line with the branch ci is inserted the nozzle of pipe e', through which a jet of steam issues, said pipe e also being provided with a st9pcocl ,f. The valve G is sten-died and guided to its position by a cross-bar, lt, through which vit can be freely rotated, and which rests upon the top of the valve, and slides up and down therewith, being guided by strips s, on the sides of the valve-chamber, it having notches t' in its ends for that purpose. The supplementary pipes tl d have also connected with them a pipe, d, eutending downward into the water, and provided `with a stop-cock,

rIhe operation of the pump, then, is as follows: To charge the pump I use either a steam-Siphon or an airA pump, connected as atie. The valve G and-stop-cock f" being closed, and the stop-cock j' opened, a jet of steam is introduced through the pipe e', which produces a vacuum in the vertical leg of the suction-pipe F, and causes the water to rise 'therein until it is full. The stop-co'ckfis then closed, and the cock f opened, when the water will rise through the pipe cZ", and fill the pump; this may be accomplished by attaching an air-pump in place of the pipe e', and exhausting the air from the suction-pipe below the valve Gr, and also from the pump-chamber, as before described. This being accomplished, the stopcocksf andj are to be closed, and the valve G raised into the position represented in red lines in iig. 3, and the pump started, when the water will be elevated through the pipe F, and discharged from the vpipo I-I, without any intervention of valves to retard its motion. v

When the pump is stopped, the valve G is to be pressed downward into its scat, and should anything have lodged thereon, it may be removed by turning and working the valve about, bythe cross-headc, until'it is removed, so as to insure a. tight joint. The water will then be retaine in the pump and in the suction-pipe, until the pump is again started, when the valve G must be raised.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The arrangement of the valve G, relatively to the pump B,suoti'onpipe F, andl branch-pipes CZ d, and their connection e, substantially @s shown andvdescribed for the purpose set forth. f

2. The arrangement ofthe branch-pipes d d, and their connection e, relatively to the vulve G, essentially as and for the purpose set forth.

EDMUN D M., IVENS.

Witnesses:

W. Momus SMITH,- SYDNEY E. SMITH. 

